Abstract: A foam composition includes a foam stabilizer, a foaming agent, a brine, and an inert gas. The foam stabilizer includes graphene. The foaming agent includes a viscoelastic surfactant. The inert gas is in the form of gas bubbles dispersed through a mixture of the foam stabilizer, the foaming agent, and the brine. The foam composition is configured to convert to a gel that is substantially impermeable to fluid flow in response to exposure to downhole conditions of a subterranean zone.

Abstract: Methods and systems for hybrid frac completion are disclosed. The methods include installing a hybrid completion system in a well and, in each zone of a first plurality of zones for plug & perf completion: activating an outer shroud of expanding shape memory polymer (SMP) around a liner, and perforating, using a perforation gun, a borehole wall. The methods further include, in each zone of the second plurality of zones for sliding sleeve completion: activating an SMP packer, and activating a sliding sleeve to expose the borehole wall. The methods further include fracturing the borehole wall by pressurizing the well; sealing, between each zone in the first and second plurality of zones, by actuating a plurality of isolation valves disposed in each zone of the first plurality of zones and each zone of the second plurality of zones; and removing the plurality of isolation valves to produce the well.

Abstract: A system is disclosed that provides the ability for a resource residing in one tenancy of a cloud service provider infrastructure (CSPI) to use the identity of a higher-level resource upon which the resource is built to access other resources residing in another tenancy of the CSPI. The system obtains a first identity associated with the first resource that is provisioned in a first tenancy of the CSPI and obtains a first token for the first resource. The system executes instructions to obtain a second identity associated with a second resource upon which the first resource is built. The second resource resides in a second tenancy of the CSPI. The system obtains a second identity associated with the second resource and obtains a second token for the first resource. The first resource uses the second token to access resources that reside in the second tenancy of the CSPI.

Abstract: A system is disclosed that includes capabilities by which a nested sub-resource residing in a service tenancy can access a customer-owned resource residing in a customer tenancy without the use of a cross-tenant policy. The disclosed system provides the ability for a nested sub-resource residing in a service tenancy to obtain the resource principal identity of a higher-level resource residing in the customer tenancy and use the identity of the higher-level resource to access a customer-owned resource residing in the customer tenancy. Using the resource principal identity of its higher-level resource, the sub-resource can access a customer-owned resource that resides in a customer tenancy in a seamless way without having to write a cross-tenancy policy statement that provides permission to the sub-resource to access the customer-owned resource.

Abstract: Methods for treating a water zone of a subterranean formation by injecting a slurry including a water-swellable particle, a fiber, and a viscous oil to reduce water production from the formation.

Abstract: A stator winding includes a plurality of conductors including ducts. The ducts can be connected to a heat pipe or a conduit providing a coolant flow to directly cool the winding. The heat pipe can be connected to a heat exchanger that includes a coolant flow. The stator winding can be produced using additive manufacturing, with hollow ducts extending through leg sections and solid end sections. The heat exchanger can also be additively manufactured. A circuit for driving an electrical machine can be in thermal communication with the heat exchanger, such that the thermal system manages both the stators and the drive circuit.

Abstract: A system is disclosed that includes capabilities by which a nested sub-resource residing in a service tenancy can access a customer-owned resource residing in a customer tenancy without the use of a cross-tenant policy. The disclosed system provides the ability for a nested sub-resource residing in a service tenancy to obtain the resource principal identity of a higher-level resource residing in the customer tenancy and use the identity of the higher-level resource to access a customer-owned resource residing in the customer tenancy. Using the resource principal identity of its higher-level resource, the sub-resource can access a customer-owned resource that resides in a customer tenancy in a seamless way without having to write a cross-tenancy policy statement that provides permission to the sub-resource to access the customer-owned resource.

Abstract: A sigma-delta modulator. The signal-delta modulator includes: an integrator having an instrumentation amplifier designed to receive an input signal to be modulated at a first input and to receive a feedback signal at a second input, wherein the integrator is designed to generate an integrator signal using the input signal and the feedback signal; a quantizer, which is designed to generate a quantizer signal in accordance with the integrator signal; a first FIR digital-to-analog converter, which is designed to generate the feedback signal in accordance with the quantizer signal; a first compensation device, which is designed to compensate for an excess loop delay in accordance with the quantizer signal; and a second compensation device, which comprises a second FIR digital-to-analog converter, which is designed to compensate for a clock cycle shift of the feedback signal in accordance with the quantizer signal.

Abstract: Techniques for consent-driven access management include: receiving, from a requestor, a request for consent for an actor to access a target set of resources in a cloud environment; identifying a consent workflow that specifies a name and/or an attribute of a set of one or more users from which to obtain respective approvals of the consent request; traversing the consent workflow to obtain the respective approvals from the set of one or more users; determining that one or more access policies, separate from the consent workflow, permit the actor to access the target set of resources; where access by the actor to the target set of resources is conditioned on both (a) obtaining the respective approvals from the set of one or more users and (b) determining that the one or more access policies, separate from the consent workflow, permit the actor to access the target set of resources.

Abstract: A stator winding includes a plurality of conductors including ducts. The ducts can be connected to a heat pipe or a conduit providing a coolant flow to directly cool the winding. The heat pipe can be connected to a heat exchanger that includes a coolant flow. The stator winding can be produced using additive manufacturing, with hollow ducts extending through leg sections and solid end sections. The heat exchanger can also be additively manufactured. A circuit for driving an electrical machine can be in thermal communication with the heat exchanger, such that the thermal system manages both the stators and the drive circuit.

Abstract: A communication circuit is disclosed. The communication circuit includes a calibration system, configured to receive clock signals respectively having first and second clock phases, and first and second duty cycles, where the calibration system is further configured to receive input data and to adjust the input data to generate adjusted data based partly on the input data and based partly on the first and second duty cycles. The communication circuit also includes a mixer, configured to receive the clock signals and to receive the adjusted data, where the mixer is configured to generate output data based on the clock signals and the adjusted data, and where a mismatch in the output data caused by the first and second duty cycles being different is reduced because of the adjustment made to the input data to generate the adjusted data.

Abstract: A multi-port converter includes a hybrid energy storage system (HESS) that provides a faster dynamic response to load changes than prior art systems, and enables either downsizing of the main energy storage system (ESS) to increase the life of the main ESS (e.g. energy battery), or retaining the same size ESS and increasing the range or life of the power source. The multi-port convertor can advantageously result in lower investment and maintenance costs, and can also advantageously provide a path for inputs to directly feed the load. All these benefits can be achieved while reducing the number of active switches and overall component count as compared to prior art systems.

Abstract: A foam composition includes a foam stabilizer, a foaming agent, a brine, and an inert gas. The foam stabilizer includes graphene. The foaming agent includes a viscoelastic surfactant. The inert gas is in the form of gas bubbles dispersed through a mixture of the foam stabilizer, the foaming agent, and the brine. The foam composition is configured to convert to a gel that is substantially impermeable to fluid flow in response to exposure to downhole conditions of a subterranean zone.

Abstract: Techniques are described for enabling resources within a cloud computing system to interact with each other. In certain embodiments, a base identifier assigned to a first resource is extended by mapping the base identifier onto a second identifier assigned to a logical resource that is built upon the first resource. This allows the first resource to have two identities, one identity indicating what the first resource is (e.g., a particular compute instance) and another identity indicating the purpose of the first resource (e.g., operating as a database for a particular tenancy). Consequently, the first resource may be provided with access privileges different from those associated with the base identifier. For example, the first resource may access another resource in the tenancy using the second identifier, but may have no access to the other resource using the base identifier.

Abstract: Techniques are described for enabling resources within a cloud computing system to interact with each other. In certain embodiments, a resource is assigned a digital token that provides certain access privileges for the duration in which the digital token is valid. The digital token permits the resource to have access for a duration sufficient to perform some operation (e.g., run one-time code or the same code periodically on a scheduled basis), but without extending the level of access for significantly longer than necessary to complete the operation. Each time the resource principal is to perform the operation, the token can be reissued to the resource to provide the resource with time-limited access privileges. The use of this short-lived token avoids having to create permanent credentials for the resource.

Abstract: A framework for establishing new regions and/or new realms. For example, techniques for establishing new regions and/or new realms by generating seed data by a seed maker and provisioning the seed data to resources for the new regions and/or new realms.

Abstract: A method for zonal isolation in a subterranean formation includes identifying a zone of interest within the subterranean formation, determining a static temperature of the zone of interest, determining a time duration for gelation of a treatment fluid, determining a concentration of a cross-linker in the treatment fluid, determining a volume of the treatment fluid to be delivered to the zone of interest, determining a correlation between cooling of a wellbore near the zone of interest and a delivery rate of the treatment fluid, determining a target wellbore temperature, delivering a cooling stage until the target wellbore temperature is reached, and delivering a treatment stage. Delivering the cooling stage and the treatment stage results in forming, within the zone of interest, a gel that is impermeable to fluid flow.

Abstract: A method of treating a region of a subterranean formation adjacent a wellbore zone, the method including cooling the wellbore zone to a wellbore temperature below a temperature of the region of the subterranean formation adjacent the wellbore zone, injecting a gellable treatment composition through the wellbore zone into the region of the subterranean formation adjacent the wellbore zone, and allowing the gellable treatment composition to gel in the region to prevent or reduce flow of an unwanted fluid from the region into the wellbore zone.

Abstract: A method for zonal isolation in a subterranean formation includes identifying a zone of interest within the subterranean formation, determining a static temperature of the zone of interest, determining a time duration for gelation of a treatment fluid, determining a concentration of a cross-linker in the treatment fluid, determining a volume of the treatment fluid to be delivered to the zone of interest, determining a correlation between cooling of a wellbore near the zone of interest and a delivery rate of the treatment fluid, determining a target wellbore temperature, delivering a cooling stage until the target wellbore temperature is reached, and delivering a treatment stage. Delivering the cooling stage and the treatment stage results in forming, within the zone of interest, a gel that is impermeable to fluid flow.

Abstract: Techniques are provided for granting an application of a first type of identity system, which uses a first type of identity token, access to a second type of identity system, which uses a second type of identity token. An application can make a request to a token exchange system. The request can include a bearer token and a public key of the application. The token exchange system can exchange the bearer token for a Proof-of-Possession token after performing verification steps. A token exchange system can exchange the first token (e.g., bearer token) for the first identity system for the second token (e.g., Proof-of-Possession token) for the second identity system without requiring entry of credentials to access the second identity system.